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20 resultsShowing papers similar to Effects of polylactic acid microplastics on dissolved organic matter across soil types: Insights into molecular composition
ClearMicroplastics alter microbial structure and assembly processes in different soil types: Driving effects of environmental factors
Researchers investigated how biodegradable polylactic acid and conventional polyethylene microplastics affect soil microbial communities across different soil types. They found that PLA increased dissolved organic carbon and pH while decreasing nitrogen availability, whereas polyethylene had contrasting effects depending on soil type. The study reveals that microplastic impacts on microbial community structure and assembly processes are soil-type-specific, with dissolved organic carbon driving changes in red soil and pH being the primary factor in fluvo-aquic soil.
Addition of biodegradable microplastics alters the quantity and chemodiversity of dissolved organic matter in latosol
Researchers found that adding biodegradable PBAT microplastics to tropical soil increased microbial and enzyme activity, which in turn altered the quantity and chemical diversity of dissolved organic matter, suggesting biodegradable plastics still significantly affect soil biogeochemistry.
Deciphering the Fingerprint of Dissolved Organic Matter in the Soil Amended with Biodegradable and Conventional Microplastics Based on Optical and Molecular Signatures
Researchers compared the effects of biodegradable and conventional microplastics on dissolved organic matter in two soil types using advanced spectroscopy techniques. They found that biodegradable polybutylene succinate significantly increased dissolved organic carbon and generated more biologically active organic molecules, likely due to polymer degradation. Conventional microplastics showed subtler effects that varied between soil types, suggesting that both biodegradable and non-biodegradable plastics can alter soil chemistry in distinct ways.
MicrobialPhysiologicalAdaptation to BiodegradableMicroplastics Drives the Transformation and Reactivity of DissolvedOrganic Matter in Soil
Researchers added virgin and aged polylactic acid and polyhydroxyalkanoate microplastics to agricultural soils and found that microbial physiological adaptation to biodegradable plastics significantly altered the transformation and reactivity of dissolved organic matter over a 56-day incubation period.
Microplastics alter soil structure and microbial community composition
Researchers found that both conventional polyethylene and biodegradable polylactic acid microplastics break down soil structure in similar ways, increasing the proportion of smaller soil clumps while reducing larger, more stable ones. The microplastics also significantly altered soil bacterial communities, with effects varying by particle size. This matters because changes to soil health can affect the food we grow and the broader ecosystem services that soil provides.
Biodegradable Polyesters and Low Molecular Weight Polyethylene in Soil: Interrelations of Material Properties, Soil Organic Matter Substances, and Microbial Community
Researchers examined how biodegradable polyesters and low molecular weight polyethylene behave in soil environments, investigating their interactions with soil organic matter and microbial communities over time. They found that both biodegradable and conventional polymer microplastics alter soil microbial community composition and interact with organic matter fractions, with biodegradable plastics showing distinct but not necessarily more benign effects than conventional plastics.
Microbial metabolism influences microplastic perturbation of dissolved organic matter in agricultural soils
Researchers studied how microplastics from both traditional polyethylene and biodegradable polylactic acid plastics change the chemistry of dissolved organic matter in farm soil. Soil microbes broke down substances released by the plastics, altering the soil's chemical composition over 100 days. Surprisingly, the biodegradable plastic released compounds that soil bacteria could more readily use, and after aging, it had roughly 10 times the pollutant-absorbing capacity of polyethylene, suggesting that so-called biodegradable plastics may pose their own environmental risks in agricultural soil.
Unveiling the impact of biodegradable polylactic acid microplastics on meadow soil health
Scientists studied how biodegradable PLA microplastics affect meadow soil over 60 days and found they changed soil chemistry, enzyme activity, and microbial communities. Smaller PLA particles had a greater impact on enzyme activity, while larger particles changed soil properties more. These findings suggest that even biodegradable plastics can significantly alter soil health when they break down into microplastics.
Aging of biodegradable microplastics and their effect on soil properties: Control from soil water
Researchers studied how biodegradable microplastics made from PLA and PBAT break down in different soil types under varying water conditions. They found that while these plastics aged more in dry and alternating wet-dry conditions, flooded conditions caused bigger changes to soil chemistry, including increased dissolved organic carbon. The study suggests that even biodegradable plastics can meaningfully alter soil properties, and the effects depend heavily on moisture conditions.
Diverse Impacts of Microplastic-derived Dissolved Organic Matter at Environmentally Relevant Concentrations on Soil Dissolved Organic Matter Transformation
Researchers examined how dissolved organic matter leached from biodegradable and conventional agricultural mulch microplastics affects soil chemistry at environmentally realistic concentrations. They found that UV-exposed microplastic leachates were more bioavailable and caused greater changes to soil organic matter than those produced in dark conditions. The study suggests that even at low concentrations, microplastic-derived compounds can meaningfully alter soil carbon dynamics, with effects varying by soil type.
[Effects of Polylactic Acid Microplastics （PLA-MPs） on Physicochemical Properties and Microbial Communities of Wheat Rhizosphere Soil].
Researchers investigated how polylactic acid microplastics affect wheat rhizosphere soil and found that they significantly altered soil chemistry, increasing phosphorus and organic matter while decreasing total nitrogen and pH. The microplastics also reduced the richness and diversity of soil microorganisms, with larger particles and higher concentrations causing the greatest disruption. The study suggests that even biodegradable plastics can meaningfully reshape soil microbial communities and nutrient cycling in agricultural settings.
Molecular insights into effects of PBAT microplastics on latosol microbial diversity and DOM chemodiversity
Researchers found that biodegradable PBAT microplastics significantly altered soil microbial community diversity and dissolved organic matter composition in tropical latosol over 120 days, with effects intensifying at higher microplastic concentrations.
Effects of different microplastics on the physicochemical properties and microbial diversity of rice rhizosphere soil
Researchers compared how conventional polyethylene and biodegradable polylactic acid microplastics, both fresh and aged, affect rice paddy soil properties and microbial communities. They found that aged microplastics had stronger effects than fresh ones, altering soil pH, nutrient availability, and the composition of root-associated bacteria. The study warns that biodegradable plastics are not necessarily safer for soil health than conventional plastics, especially as they break down over time.
Simulation of the effects of microplastics on the microbial community structure and nitrogen cycle of paddy soil
Researchers tested how three types of microplastics affect microbial communities and nitrogen cycling in paddy soil. They found that polylactic acid microplastics significantly altered soil bacterial diversity and shifted community structure, while PET and PVC had less pronounced effects. The study suggests that different types of microplastics may influence soil health and nutrient cycling in distinct ways, which matters for agricultural sustainability.
Effect of polylactic acid microplastics on soil properties, soil microbials and plant growth
Researchers tested whether microplastics from biodegradable polylactic acid plastic, often proposed as an eco-friendly alternative to conventional plastic, affect soil health and plant growth. High concentrations of these biodegradable microplastics reduced soil pH, altered the ratio of carbon to nitrogen, decreased plant growth, and shifted soil microbial communities. The study suggests that even biodegradable plastics can negatively affect agricultural ecosystems when they break down into microplastic-sized particles.
Microbial Physiological Adaptation to Biodegradable Microplastics Drives the Transformation and Reactivity of Dissolved Organic Matter in Soil
Researchers studied how soil microbes adapt to biodegradable microplastics (PLA and PHA) and how this affects dissolved organic matter in agricultural soil over 56 days. They found that PLA tripled the oxidation of plant-derived organic matter by activating lignin decomposition pathways, while PHA doubled microbially derived compounds by accelerating bacterial protein synthesis and cell turnover. The study suggests that different biodegradable plastics trigger distinct microbial strategies that reshape soil carbon cycling.
Response of soil dissolved organic matter to microplastic addition in Chinese loess soil
Researchers added microplastics to loess soil at two concentrations and tracked dissolved organic matter over 30 days, finding that even moderate additions altered the rate of organic carbon, nitrogen, and phosphorus release, stimulated soil enzyme activity, and promoted accumulation of high-molecular-weight humic compounds — suggesting microplastic pollution reshapes soil nutrient cycling.
Microplastic coupled with soil dissolved organic matter mediated changes in the soil chemical and microbial characteristics
Researchers conducted a two-month incubation experiment to study how polyethylene microplastics of different sizes and concentrations affect soil carbon composition and microbial communities. They found that microplastics altered the dissolved organic matter in soil and shifted how microbial communities utilized carbon sources. The study suggests that microplastic accumulation in agricultural soils may have cascading effects on soil health and nutrient cycling.
Microplastics Influence Dissolved Organic Matter Transformation Mediated by Microbiomes in Soil Aggregates
Researchers conducted a 450-day experiment to study how microplastics alter the transformation of dissolved organic matter within soil aggregates, a process critical for soil stability and fertility. They found that microplastics destabilized organic matter in larger soil clumps while increasing its chemical complexity in smaller ones, with biodegradable plastics having the strongest effects. These changes were driven by shifts in microbial communities, suggesting that microplastic pollution could fundamentally alter how carbon cycles through agricultural soils.
Transformation of Polylactic Acid (PLA) Microparticles in Soil and their Effects on Soil Properties: A Review
This review examined how polylactic acid (PLA) microplastics transform in soil over time and affect soil physical, chemical, and biological properties including pH, organic matter, nutrient cycling, and microbial communities, highlighting the complexities of PLA as a supposedly biodegradable agricultural plastic.